Miliarense

The miliarense (neuter form of the late Latin miliarensis, "pertaining to a thousand"; plural: miliarensia) was a large silver coin, introduced to the late Roman monetary system in the early 4th century. It was struck with variable fineness, generally with a weight between 3.8 and 6.0 grams, and a diameter of c.23-24mm. The miliarense was struck first under Constantine the Great (r. 306–337).